Ice Maker Automatic Descale and Sanitize Using Dual-Level Sump Control
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Solution Overview
Problem
Ice makers often require time-consuming and inconvenient manual descaling and sanitizing processes, which are neglected due to their labor-intensive nature and the need for service personnel to remain present until completion, affecting the cleanliness and safety of the ice production.
Innovation Solution
An automatic descale and sanitize process is implemented, utilizing a sump with separate water and sanitizer reservoirs, where water levels are controlled to mix cleaners or sanitizers with water, pumped through the system, and then purged, allowing for unattended operation and reduced maintenance time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual descaling and sanitizing processes are implemented, then cleaning effectiveness is improved, but maintenance time and labor requirements increase
Solution Approach 1:
The ice maker system automatically performs descaling and sanitizing operations without requiring manual intervention. The controller activates the water pump to circulate cleaning solutions through the freeze plate and internal channels, then automatically drains and refills the sump with appropriate concentrations of cleaner and sanitizer, eliminating the need for service personnel to remain present until completion
Solution Approach 2:
The system pre-fills the sump with water to specific levels before automated cleaning cycles begin. The controller prepares the cleaning solution in advance by mixing predetermined amounts of cleaner with water, ensuring the proper concentration is ready before the descaling process starts, which streamlines the overall maintenance operation
2Reliability
If service personnel remain present until descaling and sanitizing completion, then process monitoring is improved, but operational convenience deteriorates
Solution Approach 1:
The automated control system monitors and manages the entire descaling and sanitizing process without requiring service personnel presence. The controller tracks water levels, activates pumps and valves in sequence, and manages solution circulation and drainage automatically, providing both monitoring capability and operational convenience simultaneously
Solution Approach 2:
The system uses water level sensors to provide feedback to the controller, which automatically adjusts pump operation and solution dispensing based on real-time conditions. This closed-loop control ensures proper process execution while eliminating the need for manual monitoring, as the system self-regulates based on sensor input
3Reliability
If separate water and sanitizer reservoirs are used with controlled water levels, then contamination prevention is improved, but device complexity increases
Solution Approach 1:
The sump is divided into separate functional zones: a main water reservoir for holding bulk water and a smaller sanitizer reservoir for concentrated sanitizer solution. This segmentation prevents mixing of cleaner and sanitizer chemicals while allowing independent control of each solution's concentration and dispensing, improving contamination prevention without requiring entirely separate external reservoirs
4Reliability
If frequent maintenance is performed, then ice maker cleanliness is improved, but downtime increases
Solution Approach 1:
The automated maintenance system allows ice makers to be taken offline for cleaning much less frequently than manual processes. The efficient automated descaling and sanitizing cycles achieve thorough cleaning in reduced time, allowing the system to return to ice production quickly. Service personnel only need to initiate the process and add cleaning solutions, not monitor completion, significantly reducing the time cost of maintenance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The automatic process efficiently removes mineral buildup and sanitizes the ice maker, reducing the need for manual intervention and enabling more frequent maintenance, thereby ensuring cleaner and safer ice production while minimizing downtime.
Implementation Method 1
pumping the water and cleaner mixture from the sump through the water system and over the freeze plate
Implementation Method 2
mixes with a cleaner previously placed in the sump... to descale the water system and the freeze plate... to remove any scale or mineral build up
Implementation Method 3
pumping the water and sanitizer mixture from the sump through the water system and over the freeze plate
Implementation Method 4
to sanitize the water system and the freeze plate... to remove any harmful bacteria and other biologics
Implementation Method 5
The sump of an ice maker is filled with water to different levels during these portions of the process... descale water level... sanitize water level
Data Source
AI summary
An automatic descale and sanitize process for an ice maker which requires less user intervention and time. During descaling, a main water reservoir of an ice maker sump is filled with water to a descale water level and mixes with a cleaner placed in the main water reservoir. The water/cleaner mixture is pumped through the ice maker to descale the water system and freeze plate. During sanitizing, the sump is filled with water to a sanitize water level, above the descale water level, and mixes with sanitizer placed in a sanitizer reservoir of the sump. The water/sanitizer mixture is pumped through the ice maker to sanitize the water system and freeze plate. During descaling, the sanitizer placed in the sanitizer reservoir does not come into contact with the water in the main water reservoir. After the descale and sanitize process, the ice maker can return to making ice.